jnidzwetzki/bitfinex-v2-wss-api-java

/*******************************************************************************
 *
 *    Copyright (C) 2015-2018 Jan Kristof Nidzwetzki
 *  
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *  
 *      http://www.apache.org/licenses/LICENSE-2.0
 *  
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License. 
 *    
 *******************************************************************************/
package com.github.jnidzwetzki.bitfinex.v2.callback.channel.account.info;

import java.math.BigDecimal;
import java.util.Collection;
import java.util.List;
import java.util.function.BiConsumer;

import com.google.common.collect.Lists;
import org.json.JSONArray;

import com.github.jnidzwetzki.bitfinex.v2.callback.channel.ChannelCallbackHandler;
import com.github.jnidzwetzki.bitfinex.v2.entity.BitfinexWallet;
import com.github.jnidzwetzki.bitfinex.v2.exception.BitfinexClientException;
import com.github.jnidzwetzki.bitfinex.v2.symbol.BitfinexAccountSymbol;
import com.github.jnidzwetzki.bitfinex.v2.symbol.BitfinexStreamSymbol;

public class WalletHandler implements ChannelCallbackHandler {

    private final int channelId;
    private final BitfinexAccountSymbol symbol;

    private BiConsumer<BitfinexAccountSymbol, Collection<BitfinexWallet>> walletConsumer = (s, e) -> {};

    public WalletHandler(int channelId, final BitfinexAccountSymbol symbol) {
        this.channelId = channelId;
        this.symbol = symbol;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void handleChannelData(final String action, final JSONArray payload) throws BitfinexClientException {
        List<BitfinexWallet> wallets = Lists.newArrayList();

        if (payload.isEmpty()) {
            walletConsumer.accept(symbol, wallets);
            return;
        }

        if (payload.get(0) instanceof JSONArray) {
            // snapshot
            for (int walletPos = 0; walletPos < payload.length(); walletPos++) {
                final JSONArray walletArray = payload.getJSONArray(walletPos);
                BitfinexWallet wallet = jsonArrayToWallet(walletArray);
                wallets.add(wallet);
            }
        } else {
            // update
            BitfinexWallet wallet = jsonArrayToWallet(payload);
            wallets.add(wallet);
        }
        walletConsumer.accept(symbol, wallets);
    }

    @Override
    public BitfinexStreamSymbol getSymbol() {
        return symbol;
    }

    @Override
    public int getChannelId() {
        return channelId;
    }

    private BitfinexWallet jsonArrayToWallet(final JSONArray json) {
        final String walletType = json.getString(0);
        final String currency = json.getString(1);
        final BigDecimal balance = json.getBigDecimal(2);
        final BigDecimal unsettledInterest = json.getBigDecimal(3);
        final BigDecimal balanceAvailable = json.optBigDecimal(4, null);
        
        return new BitfinexWallet(walletType, currency, balance, unsettledInterest, balanceAvailable);
    }

    /**
     * wallet event consumer
     * @param consumer of event
     */
    public void onWalletsEvent(BiConsumer<BitfinexAccountSymbol, Collection<BitfinexWallet>> consumer) {
        this.walletConsumer = consumer;
    }
}